Delete the line that are repeated

Hello, I made a code that compares two strings and what I want to do is to delete from the old strings the lines that are in the new one.

tf = strcmp(seq1,seq2);  
        disp('Comparing')
        disp(seq1);
        disp(seq2);

        disp(tf);
        if tf == 1
           disp('Ha entrado al if')
             M_conjunt = [M_conjunt,seq1];
            
        end

I want to delete the ones that are in M_conjunt from both seq1 and seq2. I do not know how to do it. Thank youu!!!!

[Rik]

I have already suggested ismember to you before. Try it.

[Jan]

It is not clear, what the inputs seq1 and seq2 are: CHAR vectors, Strings, cell strings, string arrays?

The useful functions are: ismember, setdiff, union, unique.

[flashpode]

Are Strings. I use strcmp and I've used as you recomended ismember but the result is the same and I got the problem with the 0. because I want to do a matrix that contais only the messages that are just in AIS1 and not in common in AIS2 and I can't with those functions.

Answer 1

[Matt J]

what I want to do is to delete from the old strings the lines that are in the new one.

For example,

oldstring=["dog"; "fish"; "cat";"zebra"]

oldstring = 4×1 string array
    "dog"
    "fish"
    "cat"
    "zebra"

newstring=["fish"; "zebra"]

newstring = 2×1 string array
    "fish"
    "zebra"

difference=setdiff(oldstring,newstring)

difference = 2×1 string array
    "cat"
    "dog"